CdSe量子点膨润土复合材料的制备与表征

Abstract

Mercaptosuccinic acid capped CdSe quantum dots were prepared in aqueous solution by using SeO2as selenium source and NaBH4as reductant. Then,the CdSe quantum dots bentonite luminescent material was prepared by mixing the CdSe quantum dots solution and organic bentonite under stirring. The obtained sample was characterized by photoluminescence spectra,scanning electron microscopy and X-ray diffraction. The spectra analysis results disclosed that the illuminant color of quantum dots bentonite composites was similar to the corresponding quantum dots solution. The energy-dispersive X-ray spectra demonstrated that Cd and Se elements presented in the composites. X-ray diffraction measurements indicated that the(111),(220) and(331) diffraction peak of CdSe appeared in quantum dots bentonite composites,and the(001) diffraction peak at 2θ = 4. 3° in the raw bentonite. These results suggest that the preparation of CdSe quantum dots bentonite composites do not change the structures of quantum dots and bentonite.